Ratchet tool

Abstract

A ratchet tool includes a handle with a shaft extending therefrom onto which a base member, a plate and an adjusting member are respectively mounted. The base member has two pawl members biasedly received in the first end thereof so as to engage with the elongated grooves in the shaft and each of the pawl members has a bar engaged therewith wherein the bars are pivotally connected to the base member. The plate fixedly connected to the base member has three positioning dents and the adjusting member has a rod extending therefrom which is located between the two bars, a ball is received in one of the three positioning dents and biased by a spring received in the adjusting member. When rotating the adjusting member, one of the bars is moved to remove the corresponding pawl member from the elongated groove so that the effective direction of the shaft to be rotated is decided by the operation of the adjusting member.

What is claimed is: 
     
       1. A ratchet tool comprising: a base member having a central hole defined therethrough for a shaft extending therethrough which has a plurality of elongated grooves defined in the outside thereof and is adapted to be fixedly connected to a handle, two recesses respectively defined in the first end thereof and communicating with said central hole, two holes respectively defined in the first end of said base member and located above said two recesses;   two pawl members respectively received in said two grooves and biased by two respective springs, each of said two pawl members having a tooth extending therefrom and a concavity defined therein, said tooth of each of said two pawl members engaged with one of said elongated grooves;   two bars respectively engaged with said two concavities of said two pawl members and pivotally engaged with said two holes so that said shaft is located between said two bars and said two pawl members;   a plate fixedly connected to the first end of said base member and mounted to said shaft, three positioning dents respectively defined in said plate, and   an adjusting member mounted to said plate and having a rod extending therefrom which is located between said two bars and a ball biasedly received between said adjusting member and one of said three positioning dents so that when rotating the adjusting member, one of said pawl members is disengaged from said elongated groove by one of said bars.   
     
     
       2. The ratchet tool as claimed in claim 1, wherein said plate has an aperture defined therethrough and said first end of said base member has a threaded hole so that a bolt extends through said aperture and threadedly engaged with said threaded hole. 
     
     
       3. The ratchet tool as claimed in claim 1, wherein said plate has a tube extending therefrom through which shaft extends, said adjusting member rotatably mounted to said tube. 
     
     
       4. The ratchet tool as claimed in claim 1, wherein each of said bars has a pin extending laterally therefrom which is inserted into one of said two holes. 
     
     
       5. The ratchet tool as claimed in claim 1, wherein said adjusting member has a tubular member which has a spring received therein so as to bias said ball.